Abstract:

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Based on the beam coherence-polarization (BCP) matrix approach and propagation law
of partially coherent beams, the propagation properties of partially polarized Gaussian Schell-model
(PGSM) beams through an aperture lens with spherical aberration were studied. Our main attention
was focused on the effect of spherical aberration of the lens, partial coherence, aperture diffraction
and polarization on the behavior of the irradiance. The numerical calculation results are given to
illustrate how these parameters affect the focusing properties. A comparison with the previous
publications is also made, showing some extension has been made in our work.

Abstract: Based on the Rayleigh-Sommerfeld diffraction integrals, the closed-form expression of nonparaxial cosine-squared Gaussian beams in free space is derived. The power in the bucket (PIB) of nonparaxial regime is introduced to characterize the beam quality of nonparaxial beams in the far field. It is found that the intensity and PIB of nonparaxial cosine-squared Gaussian beams depends on f parameter, decentered parameter, and the PIB is additionally depends on the bucket’s size taken. For a given bucket’s size, the smaller decentered parameter and f parameter result in the better power focusability in the far field and the better beam quality.

Abstract: The effect of positive spherical aberration of micro-lens on the optical crosstalk in free space optical interconnects is considered. Using the derived field distribution at the detector array, the optical crosstalk level is evaluated and numerical results are provided. It is found that practical lenses with positive spherical aberration increases the crosstalk and degrade the system performance.